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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 353 (ENGINE CONTROLS - TROUBLE SHOOTING - NO CODES - 2.2L Bi-Fuel) >> INTERMITTENTS >> Intermittent Conditions >> Incorrect PCM Programming

Incorrect PCM Programming

WARNING: This page is about a different car, the 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
  1. There are only a few situations when reprogramming a PCM is appropriate, such as the following:
    • A new service PCM is installed.
    • A PCM from another vehicle is installed.
    • Revised software or calibration files have been released for this vehicle.
    2. NOTE: DO NOT re-program the PCM with the SAME software or calibration files that are already present in the PCM. This is not an effective repair for any type of driveability problem.
  2. Verify that the PCM contains the correct software or calibration. If incorrect programming is found, reprogram the PCM with the most current software or calibration. See PROGRAMMING in SELF-DIAGNOSTICS - 2.2L ALERO, CAVALIER, GRAND AM & SUNFIRE - GASOLINE article.
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